CN113836952A - Unique identifier UID matching method, device and equipment of electronic tag - Google Patents
Unique identifier UID matching method, device and equipment of electronic tag Download PDFInfo
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Abstract
The invention provides a method, a device and equipment for matching Unique Identifiers (UIDs) of electronic tags. The method comprises the following steps: acquiring a first mask length and a mask value corresponding to the first mask length; determining a target matching mode according to the first mask length; matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using the target matching mode to obtain a matching result; and responding to the reader according to the matching result. The method of the embodiment of the invention gives consideration to the balance between cost and performance.
Description
Technical Field
The invention relates to the technical field of Radio Frequency Identification (RFID), in particular to a Unique Identifier (UID) matching method, device and equipment of an electronic tag.
Background
Radio frequency identification is a radio frequency identification technology that uses radio frequency signals to achieve contactless information transfer through spatial coupling and identifies objects through the transferred information. The RFID system conforming to the ISO 15693 protocol consists of three parts, namely an electronic tag, a reader and an application system, wherein the reader can only perform read-write operation on one electronic tag in a magnetic field at a certain moment under normal conditions, and when a plurality of electronic tags enter a radio frequency field of the reader at the same time, the problem of collision can occur.
In the prior art, if a conflict problem occurs, a reader and an electronic tag are established to effectively communicate with one electronic tag by matching a mask value with a mask length with a unique identifier with a mask length of the electronic tag, for example, the mask value is consistent with the unique identifier of the electronic tag, and then the electronic tag should return a response. If no electronic tag responds or multiple electronic tags respond and the reader detects a response conflict, the reader can increase the mask length and set an appropriate mask value until only one electronic tag responds, so that the conflict of multiple electronic tags is avoided. The key point of the above scheme is the process of matching the mask value of the mask length with the electronic tag UID, and different matching implementation schemes have great influence on the chip area (influence cost) and the chip performance of the electronic tag, so how to implement matching between the mask value and the electronic tag UID under the condition of considering both cost and performance is a problem that needs to be mainly addressed by technical personnel in the field.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method, a device and equipment for matching a unique identifier UID of an electronic tag.
Specifically, the embodiment of the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a unique identifier UID matching method for an electronic tag, including:
acquiring a first mask length and a mask value corresponding to the first mask length;
determining a target matching mode according to the first mask length;
matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using the target matching mode to obtain a matching result;
and responding to the reader according to the matching result.
Further, the determining a target matching manner according to the first mask length includes:
under the condition that the length of the first mask is larger than a first preset length, the target matching mode is a first matching mode;
and under the condition that the length of the first mask is smaller than a second preset length, the target matching mode is a second matching mode.
Further, when the first mask length is greater than a first preset length, the matching, by using the target matching method, the matching between the part of the unique identifier UID of the electronic tag with the first mask length and the part of the mask value with the first mask length to obtain a matching result includes:
step a, if the first mask length is smaller than a length threshold, determining a first matching length according to the first mask length and a preset corresponding relation, and determining whether a part from a preset bit to a target bit in the UID is matched with the part from the preset bit to the target bit in the mask value; the preset bit is the number of bytes multiplied by the number of byte bits, the target bit is the preset bit plus the bit of the first matching length, and the initial value of the number of bytes is a target value; the corresponding relation comprises: the corresponding relation between the first mask length and the first matching length;
step b, if the first mask length is matched with the second mask length, subtracting a first numerical value from the first mask length to obtain a second mask length; increasing the number of bytes by a first number of bytes; the first value is the first matching length plus a second value; the first byte number is the first numerical value divided by the byte bit number;
and c, taking the second mask length as the first mask length, and repeatedly executing the steps a-b until the first mask length is smaller than the second preset length.
Further, when the first mask length is smaller than a second preset length, the matching, by using the target matching method, the matching between the part of the unique identifier UID of the electronic tag with the first mask length and the part of the mask value with the first mask length to obtain a matching result includes:
determining a target byte where an unmatched part in the mask value is located according to the number of bytes, sequentially determining whether the part of the first mask length in the UID is matched with the part of the first mask length in the mask value from the lower bit of the target byte, and obtaining a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
Further, if the first mask length is equal to the length threshold, determining whether the UID is matched with the mask value, and obtaining a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
Further, before responding to the reader according to the matching result, the method further includes:
determining a time slot value and a time slot length according to the first mask length;
determining whether the time slot value is consistent with the value corresponding to the preset sequence or not according to the time slot length;
and if so, responding to the reader according to the matching result.
In a second aspect, an embodiment of the present invention further provides an apparatus for matching a unique identifier UID of an electronic tag, including:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a first mask length and a mask value corresponding to the first mask length;
the processing module is used for determining a target matching mode according to the first mask length; the electronic tag UID is used for matching a part of the electronic tag UID with a first mask length by using the target matching mode to obtain a matching result; and responding to the reader according to the matching result.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method for matching the unique identifier UID of the electronic tag according to the first aspect when executing the program.
In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the unique identifier UID matching method for electronic tags according to the first aspect.
In a fifth aspect, an embodiment of the present invention further provides a computer program product, which includes a computer program, and when being executed by a processor, the computer program implements the steps of the unique identifier UID matching method for an electronic tag according to the first aspect.
According to the unique identifier UID matching method, device and equipment of the electronic tag, matching is carried out in a corresponding appropriate target matching mode according to different lengths of the acquired first mask, and response is carried out according to a matching result; in the scheme, the corresponding appropriate target matching mode is determined through the first mask length, so that the design area is relatively small while higher performance is obtained, and the balance between cost and performance is effectively considered.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a unique identifier UID matching method for electronic tags according to the present invention;
fig. 2 is a frame diagram of an implementation of a unique identifier UID matching method for an electronic tag provided by the present invention;
fig. 3 is another schematic flow chart of a unique identifier UID matching method for electronic tags according to the present invention;
fig. 4 is a schematic structural diagram of a unique identifier UID matching device of an electronic tag provided by the present invention;
fig. 5 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method provided by the embodiment of the invention can be applied to the UID matching scene of the unique identifier of the electronic tag, and effectively considers the balance between cost and performance.
In the related art, an RFID system conforming to the ISO 15693 protocol is composed of three parts, namely an electronic tag, a reader and an application system, and normally, the reader can only perform read-write operation on one electronic tag in a magnetic field at a certain time, and when a plurality of electronic tags enter a radio frequency field of the reader at the same time, a collision problem occurs.
In case of collision, the prior art generally establishes that the reader establishes effective communication with an electronic tag by matching the mask value of the mask length with the unique identifier of the mask length of the electronic tag. The key point of the above scheme is the process of matching the mask value of the mask length with the electronic tag UID, and different matching implementation schemes have great influence on the chip area (influence cost) and the chip performance of the electronic tag, so how to implement matching between the mask value and the electronic tag UID under the condition of considering both cost and performance is a problem that needs to be mainly addressed by technical personnel in the field.
According to the unique identifier UID matching method of the electronic tag, the matching is carried out in a corresponding proper matching mode according to the difference of the obtained lengths of the first masks, the high performance is obtained, meanwhile, the design area is relatively small, and the balance between the cost and the performance is effectively considered.
The technical solution of the present invention is described in detail with specific embodiments in conjunction with fig. 1-5. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic flowchart of an embodiment of a method for matching a unique identifier UID of an electronic tag according to an embodiment of the present invention. As shown in fig. 1, the method provided by this embodiment includes:
Specifically, in the RFID system, after the electronic tag enters the radio frequency field, the electronic tag may obtain the mask length and the mask value corresponding to the mask length from the information sent by the reader, that is, the mask length obtained by the electronic tag from the reader is the first mask length.
For example, the mask value obtained by the electronic tag from the information sent by the reader is S, and the mask length is M, then M is the first mask length.
specifically, the electronic tag may select a suitable matching manner to match the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, which is of the first mask length, according to the obtained value of the first mask length.
For example, when the first mask length is greater than a, if the a-mode is more appropriate, it may be determined that the a-mode is used as a target matching mode, that is, the a-mode is selected to match a part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, where the part of the unique identifier UID is the first mask length; when the first mask length is smaller than B, if the B-mode is more appropriate, it may be determined that the B-mode is used as a target matching mode, that is, the B-mode is selected to match a portion of the unique identifier UID of the electronic tag with the first mask length.
103, matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using a target matching mode to obtain a matching result;
specifically, when the electronic tag determines a suitable target matching mode according to the acquired first mask length, the determined matching mode may be used to match the part of the electronic tag UID with the first mask length with the part of the electronic tag UID with the first mask length, so as to acquire a matching result.
For example, the length of the electronic tag UID is 64 bits, and when the electronic tag determines the a mode as the target matching mode according to the first mask length M acquired by the electronic tag, the a mode can be used to match the part with the length M in the electronic tag UID with the part with the length M in the mask value to determine whether the matched contents are the same; when the electronic tag determines the b mode as the target matching mode according to the first mask length N acquired by the electronic tag, the part with the length of N in the electronic tag UID can be matched with the part with the length of N in the mask value by using the b mode to determine whether the matched contents are the same.
And 104, responding to the reader according to the matching result.
Specifically, whether to respond to the reader is determined according to a matching result of a part of the unique identifier UID of the electronic tag with the first mask length in the mask value.
For example, matching a part with the length of M in the electronic tag UID with a part with the length of M in the mask value by using a mode a, and when the matching result is that the matching contents are different, the electronic tag does not respond; and when the matching result is that the matching contents are the same, the electronic tag responds and sends response information to the reader.
According to the method, the electronic tag selects a proper mode to match the part of the first mask length in the unique identifier UID of the electronic tag with the part of the first mask length in the mask value according to the acquired first mask length, namely, the electronic tag determines and uses the proper matching mode as a target matching mode to complete matching work according to the acquired first mask length by considering the cost and performance of various matching modes in different application scenes, and the balance between the cost and the performance is effectively considered.
In an embodiment, the step 102 of "determining the target matching manner according to the first mask length" may be specifically implemented by the following steps:
under the condition that the length of the first mask is larger than a first preset length, the target matching mode is a first matching mode;
and under the condition that the length of the first mask is smaller than the second preset length, the target matching mode is a second matching mode.
For example, the first preset length may be set to 7, the second preset length may be set to 8, the first matching manner is a, and the second matching manner is b. And when the first mask length is 5 and the first mask length 5 is less than the second preset length 8, the b mode is better in performance, and the target matching mode is determined to be b.
According to the method, according to the first mask length obtained by the electronic tag, a proper matching mode is selected to match the part of the first mask length in the unique identifier UID of the electronic tag with the part of the first mask length in the mask value; for different first mask lengths, the cost and the performance obtained by selecting different matching modes are different, and the balance between the cost and the performance can be effectively considered by determining a proper target matching mode.
In an embodiment, when the first mask length is greater than the first preset length, in step 103, "matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using a target matching method, and obtaining a matching result" may specifically be implemented by the following steps:
step a, if the first mask length is smaller than the length threshold, determining a first matching length according to the first mask length and a preset corresponding relation, and determining whether a part from a preset bit to a target bit in the UID is matched with a part from the preset bit to the target bit in the mask value; the preset bit is the number of bytes multiplied by the number of byte bits, the target bit is the preset bit plus the bit of the first matching length, and the initial value of the number of bytes is the target value; the corresponding relation comprises: the corresponding relation between the first mask length and the first matching length;
step b, if the first mask length is matched with the second mask length, subtracting a first numerical value from the first mask length to obtain a second mask length; increasing the number of bytes by a first number of bytes; the first value is the first matching length plus the second value; the first byte number is the first numerical value divided by the byte bit number;
and c, taking the second mask length as the first mask length, and repeatedly executing the steps a-b until the first mask length is smaller than the second preset length.
Specifically, the preset corresponding relationship is a corresponding relationship between the first mask length and the first matching length.
For example, when the first mask length obtained by the electronic tag is 18 and the first preset length is 7, that is, the first mask length 18 is greater than the first preset length 7, step a and step b are performed;
(1) the corresponding parameters in the first matching mode, step a and step b, may be set as follows:
table 1 defines the correspondence of the first mask length to the first match length: when the first mask length is greater than 31, the first matching length is 31; when the first mask length is greater than 15 and less than or equal to 31, the first matching length is 15; when the first mask length is greater than 7 and equal to or less than 15, the first matching length is 7.
TABLE 1
| Serial number | First mask length | |
| 1 | First mask length>31 | 31 |
| 2 | 31>= first mask length>15 | 15 |
| 3 | 15>= first mask length>7 | 7 |
Length threshold value: the anti-collision process specification in accordance with an ISO 15693 protocol supports two anti-collision modes of 1 time slot and 16 time slots; when the electronic tag is in a 1-time-slot anti-collision mode, the corresponding length threshold value is 64; the electronic tag is in a 16-time-slot anti-collision mode, and the corresponding length threshold is 60;
number of bytes: the target value is preset to be 0, and the initial value of the number of bytes is the target value, namely the initial value of the number of bytes is 0;
presetting bit positions: the byte bit number is preset to be 8, the preset bit is the number of bytes multiplied by the byte bit number, namely the preset bit is an initial value 0 multiplied by the byte bit number 8 of the number of bytes, and the initial value of the preset bit is 0;
target bit: the target bit is a preset bit plus a bit of a first matching length, that is, the initial value of the target bit is a preset bit 0 plus a first matching length 15, that is, the target bit is 15;
the first value: the second value is preset to be 1, the first value is the first matching length plus the second value, namely the first matching length 15 plus the second value 1, namely the first value is 16;
the first byte number: the first byte number is a first value divided by the byte bit number, that is, the first byte number is a first value 16 divided by the byte bit number 8, and the first byte number is 2.
(2) The first matching mode comprises the following steps:
the length of the first mask acquired by the electronic tag is 18, which is smaller than the length threshold 64, and the first matching length can be determined to be 15 according to the length of the first mask and the preset corresponding relation in table 1; when the preset bit is 0 and the target bit is 15, determining whether a part from the preset bit to the target bit in the electronic tag UID is matched with a part from the preset bit to the target bit in the mask value, namely determining whether a part from the bit 0 to the bit 15 in the electronic tag UID is matched with a part from the bit 0 to the bit 15 in the mask value.
(3) The first matching mode step b is as follows:
if the bits 0 to 15 of the electronic tag UID in the step a are the same as the bits 0 to 15 of the mask value, subtracting a first numerical value 16 from the first mask length 18 to obtain a second mask length 2; increasing the number of bytes by a first byte number, namely increasing the number of bytes by 0 and 2, wherein the number of bytes is 2;
taking the second mask length 2 as the first mask length, where the first mask length 2 is smaller than the second preset length 7, in this way, the matching process is ended, and when the first mask length is continuously smaller than the second preset length, the corresponding target matching mode is used for matching, which is specifically referred to the following embodiment.
According to the method, the electronic tag selects a proper mode to match the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, wherein the part of the unique identifier UID of the electronic tag is the first mask length; when the length of the first mask is greater than the first preset length, the first matching mode of the embodiment is used as a target matching mode, so that the time required by matching the masks can be greatly reduced, and a better matching effect can be obtained compared with other modes.
In an embodiment, when the first mask length is smaller than the second preset length, in step 103, "matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using a target matching method, and obtaining the matching result" may specifically be implemented by the following steps: determining a target byte where an unmatched part in the mask value is located according to the number of bytes, sequentially determining whether the part of the first mask length in the UID is matched with the part of the first mask length in the mask value from the lower bit of the target byte, and obtaining a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
For example, when the first mask length is 18 and the first preset length is 7, after matching according to the first matching method, the second mask length is used as the first mask length, that is, the first mask length is 2 and the number of bytes is 2;
when the second preset length is 8, and the first mask length 2 is smaller than the second preset length 8, the matching steps according to the second matching mode are as follows:
according to the number of bytes 2, namely the first matching mode finishes the matching of 16 bits in total of 2 bytes, the target byte where the part which is not matched in the mask is positioned can be determined to be the third byte; whether the part of the first mask length in the UID is matched with the part of the first mask length in the mask value is determined in sequence from the lower bit of the third byte, namely, 2 bits in the UID are determined to be matched with 2 bits in the mask value in sequence from the lower bit of the third byte in the electronic tag UID; and if the matching result of the part with the first mask length in the unique identifier UID of the electronic tag is consistent with the matching result of the part with the first mask length in the mask value, the electronic tag responds to the reader according to the matching result, and the electronic tag sends response information to the reader.
According to the method, the electronic tag selects a proper mode to match the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, wherein the part of the unique identifier UID of the electronic tag is the first mask length; when the length of the first mask is smaller than the second preset length, the second matching mode of the embodiment is used as a target matching mode, so that the defect that the performance of the first matching mode is reduced in the scene is overcome, and the condition that the length of the first mask is smaller than the second preset length can be matched only in one clock cycle to obtain a result; better matching effect can be obtained compared with other modes.
In an embodiment, in step 103, "matching the part of the electronic tag UID with the first mask length in the mask value by using a target matching method, and obtaining a matching result", further includes the following steps:
if the first mask length is equal to the length threshold, determining whether the UID is matched with the mask value, and acquiring a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
Specifically, the anti-collision process specification conforming to the ISO 15693 protocol supports two anti-collision modes of 1 time slot and 16 time slots; when the electronic tag is in a 1-time-slot anti-collision mode, the corresponding length threshold value is 64; the electronic tag is in a 16-time-slot anti-collision mode, and the corresponding length threshold is 60;
when the electronic tag is in a 1-time-slot anti-collision mode, if the first mask acquired by the electronic tag is equal to 64, matching the 64-bit UID with the 64-bit mask value, if the two are matched, subtracting a length threshold value of 64 from the length of the first mask, and sending response information to the reader by the electronic tag;
when the electronic tag is in a 16-time-slot anti-collision mode, if the first mask acquired by the electronic tag is equal to 60, matching the 60-bit UID with the 60-bit mask value, if the two are matched, subtracting a length threshold value 60 from the length of the first mask, and sending response information to the reader by the electronic tag; if the two are not matched, the electronic tag does not respond.
According to the method, the electronic tag selects a proper mode to match the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, wherein the part of the unique identifier UID of the electronic tag is the first mask length; in the case that the first mask length is equal to the length threshold, the overall matching between the part of the first mask length in the mask value and the electronic tag UID is directly performed, and a better balance between cost and performance can be obtained than other ways.
In one embodiment, before "before responding to the reader according to the matching result" in step 104, the method further includes the following steps:
determining a time slot value and a time slot length according to the first mask length;
determining whether the time slot value is consistent with the value corresponding to the preset sequence or not according to the time slot length;
and if the matching result is consistent with the preset matching result, responding to the reader according to the matching result.
Specifically, the anti-collision process specification conforming to the ISO 15693 protocol supports two anti-collision modes of 1 time slot and 16 time slots; when the electronic tag is in a 1-time-slot anti-collision mode, only the part with the first mask length in the unique identifier UID of the electronic tag needs to be matched with the part with the first mask length in the mask value; the electronic tag is in a 16-time-slot anti-collision mode, and after the electronic tag needs to complete the matching of the electronic tag UID with the first mask length and the mask with the first mask length, the electronic tag needs to perform the matching of a time slot value and a preset sequence; wherein, the time slot value is a 4-bit value of the mask length in the electronic tag UID; the preset sequence is a numerical value of a single specific preset sequence received by the electronic tag; and the electronic tag responds to the reader according to the matching result.
The matching process of the time slot value and the value corresponding to the preset sequence is as follows:
(1) determining a time slot value and a time slot length according to the first mask length; when the first mask length acquired by the electronic tag is less than or equal to 4, setting the time slot length to be 4, wherein the time slot value is a value of 4 bits behind the first mask length in the byte;
when the first mask length acquired by the electronic tag is greater than 4, setting the time slot length to be 8 minus the first mask length, wherein the time slot value is the residual bit value except the first mask length in the byte;
for example, when the first mask length obtained by the electronic tag is 2, the time slot length is 4, and the time slot value is a value of 4 bits after the first mask length in the byte, that is, a value of 3 rd, 4 th, 5 th, and 6 th bits in the byte;
when the first mask length obtained by the electronic tag is 7, the time slot length is 1, and the time slot value is the value of the remaining 1 bit in the byte.
(2) Determining whether the time slot value is consistent with the value corresponding to the preset sequence or not according to the time slot length;
if the time slot length is 4, matching the time slot value with a numerical value corresponding to a preset sequence; if the time slot length is less than 4, the time slot value with the time slot length of 4 needs to be formed by the time slot value with the current time slot length and the bit value of the higher byte, and is matched with the value corresponding to the preset sequence.
For example, when the first mask length obtained by the electronic tag is 2, the time slot length is 4, and the time slot value is a value 4 bits after the first mask length in the byte, that is, values of 3 rd, 4 th, 5 th, and 6 th bits in the byte are matched with the preset sequence;
when the first mask length obtained by the electronic tag is 7, the time slot length is 1, that is, the value of the remaining 1 bit in the byte and the value of the 3 bits in the higher byte form a time slot value with the time slot length of 4, and the time slot value is matched with the preset sequence.
(3) And if the matching result is consistent with the preset matching result, responding to the reader according to the matching result.
And if the time slot value is consistent with the value corresponding to the preset sequence, the electronic tag responds to the reader according to the matching result, and the electronic tag sends response information to the reader.
For example, when the first mask length obtained by the electronic tag is 2, if the values of the 3 rd, 4 th, 5 th and 6 th bits in the byte are 0010 and the value of the preset sequence is 0010, the time slot value is matched with the preset sequence, the electronic tag responds and sends response information to the reader;
when the first mask length obtained by the electronic tag is 7, the time slot length is 1, if the time slot value with the time slot length of 4, which is formed by the value of the remaining 1 bit in the byte and the value of the 3 bits in the higher bit byte, is 1010, and if the value of the preset sequence is 0010, the time slot value is inconsistent with the preset sequence, and the electronic tag does not respond.
According to the method, the electronic tag selects a proper mode to match the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, wherein the part of the unique identifier UID of the electronic tag is the first mask length; when the electronic tag is in a 16-slot anti-collision mode, the time slot length and the time slot value are determined by using the first mask code length, the time slot value is matched with a numerical value corresponding to a preset sequence, and a response is performed according to a matching result.
Illustratively, the frame diagram of the present embodiment is shown in fig. 2:
the data cache unit acquires a first mask length, a mask value and a preset sequence, and determines a target matching mode according to the first mask length; when the mask length is larger than 7, the processing unit matches the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, which is the first mask length, by using the first matching mode unit; when the mask length is less than 7, the processing unit matches the part of the unique identifier UID of the electronic tag with the part of the unique identifier UID of the electronic tag, which is the first mask length, by using a second matching mode unit; when the part of the first mask length in the unique identifier UID of the electronic tag is successfully matched with the part of the first mask length in the mask value, the time slot judging and matching unit judges whether the electronic tag is in a 16-time slot anti-collision mode or a 1-time slot anti-collision mode, determines whether the time slot value is consistent with a numerical value corresponding to a preset sequence or not according to the time slot length, and responds to the reader according to a matching result.
For example, the specific flow of matching the unique identifier UID of the electronic tag is shown in fig. 3:
the reader initiates an anti-collision process, the electronic tag obtains a first mask length and a mask value corresponding to the first mask length, and the data cache unit caches the first mask length and parameters required by the cache operation process, including: the device comprises a first preset length, a second preset length, a target value, the number of bytes, a preset bit, a second numerical value, a corresponding relation between the first mask length and the first matching length, a length threshold, the number of bytes and a unique identifier. Wherein mask _ val in the drawings indicates: UID represents: a unique identifier; mask _ len denotes: x represents: presetting bits, and multiplying the number of x = bytes by 8; mask _ byte: representing a mask value in a byte where a preset bit is located, mask _ byte = mask _ val [ x7, x ]; uid _ byte: representing the UID value of the byte where the preset bit is located, UID _ byte = UID [ x7, x ]; slot _ len denotes: slot _ num represents: a time slot value; 301 is a first matching mode; 302 is a second matching mode.
For example: the first mask length obtained by the electronic tag is 63, the first preset length of the cache is 7, the second preset length is 8, the target value is 0, the number of bytes is 0, the preset bit is 0, the second value is 1, the corresponding relation between the first mask length and the first matching length is shown in table 1, the 1-time-slot anti-collision mode length threshold is 64, the 16-time-slot anti-collision mode length threshold is 60, and the bit number of bytes is 8.
determining a target matching mode according to the first mask code length, and when the first mask code length is larger than 64 bits, because the UID of the electronic tag is only 64 bits, the first mask code length does not meet the matching condition and cannot meet the next matching, executing step 11, and the electronic tag does not respond;
when the first mask length is less than or equal to 64, continuing to execute the step 3;
judging whether the mode is a 1 time slot anti-collision mode or a 16 time slot anti-collision mode;
if the 1 time slot anti-collision mode exists, continuing to execute the step 4;
if the mode is a 16-time-slot anti-collision mode and the length of the first mask is less than or equal to 60, executing step 5;
if the mode is a 16-time-slot anti-collision mode and the length of the first mask is greater than 60, namely the length of the first mask is greater than the length threshold value, the matching condition is not met, step 11 is executed, and the electronic tag does not respond;
step 4, judging whether the obtained first mask length is equal to 64;
determining a target matching mode according to the first mask code length, and if the electronic tag is in a 1-time-slot anti-collision mode and the first mask code length is not equal to 64, executing a step 5;
if the electronic tag is in a 1-time-slot anti-collision mode and the length of the first mask is equal to 64, matching the 64-bit mask with the 64-bit UID integrally, and if the matching result is inconsistent, executing the step 11 and enabling the electronic tag not to respond; if the matching result is consistent, subtracting 64 from the first mask length, and executing the step 5;
step 5, judging whether the length of the first mask is larger than 31;
determining a target matching mode according to the first mask length, and judging whether the first mask length is larger than 31 when the first mask length is larger than a first preset length 7; when the first mask length is greater than 31, the first matching length is 31 according to the corresponding relationship between the first mask length and the first matching length in table 1; matching the part from the preset bit to the target bit of the electronic tag with the part from the preset bit to the target bit in the mask value, if the matching is inconsistent, executing the step 11, and the electronic tag does not respond; if the matching is consistent, the number of the bytes is set to be 4, and the length of the first mask is subtracted by 32; if the first mask length is less than or equal to the first preset length, executing step 6;
for example, when the first mask length is 63 and the first mask length 63 is greater than the first preset length 7, the first matching method 301 is the determined target matching method; according to the corresponding relation between the first mask length and the first matching length in table 1, if the first matching length is 31, performing step 5 to match 32 bit values, namely the preset bit 0 to the target bit 31 in the unique identifier UID of the electronic tag, with 32 bit values, namely the preset bit 0 to the target bit 31 in the mask; if the matching is consistent, assigning the number of the bytes to be 4, and subtracting 32 from the first mask length, namely assigning the first mask length to be 31;
step 6, judging whether the length of the first mask is larger than 15;
determining a target matching mode according to the first mask length, and judging whether the first mask length is greater than 15 or not when the first mask length is greater than a first preset length 7; when the first mask length is greater than 15 and less than or equal to 31, the first matching length is 15 according to the corresponding relationship between the first mask length and the first matching length in table 1; matching the part from the preset bit to the target bit of the electronic tag with the part from the preset bit to the target bit in the mask value, if the matching is inconsistent, executing the step 11, and the electronic tag does not respond; if the matching is consistent, adding 2 to the number of the bytes, and subtracting 16 from the first mask length; if the first mask length is less than or equal to the first preset length, executing step 7;
for example, if the first mask length is 31, according to the corresponding relationship between the first mask length and the first matching length in table 1, and the first matching length is 15, step 6 is performed to match a 16-bit value, which is the total of the preset bit 32 to the target bit 47, in the unique identifier UID of the electronic tag with a 16-bit value, which is the total of the preset bit 32 to the target bit 47 in the mask; if the matching is consistent, adding 2 to the number of the bytes, namely the number of the bytes is 6; the first mask length minus 16, i.e. the first mask length is 15;
determining a target matching mode according to the first mask length, and judging whether the first mask length is greater than 7; when the first mask length is greater than 7 and less than or equal to 15, the first matching length is 15 according to the corresponding relationship between the first mask length and the first matching length in table 1; matching the part from the preset bit to the target bit of the electronic tag with the part from the preset bit to the target bit in the mask value, if the matching is inconsistent, executing the step 11, and the electronic tag does not respond; if the matching is consistent, adding 1 to the number of the bytes, and subtracting 8 from the length of the first mask; if the first mask length is less than or equal to the first preset length, executing step 8;
for example, when the first mask length is 15, according to the corresponding relationship between the first mask length and the first matching length in table 1, if the first matching length is 7, performing step 7 to match 8-bit values, including the preset bit 48 to the target bit 55, in the unique identifier UID of the electronic tag with 8-bit values, including the preset bit 48 to the target bit 55 in the mask; if the matching is consistent, adding 1 to the number of the bytes, namely the number of the bytes is 7; the first mask length minus 8, i.e. the first mask length is 7;
if the first mask length is equal to 0, assigning the time slot length to 0, and continuing to execute the step 9; if the first mask length is not equal to 0 and is smaller than the second preset length 8, determining 302 that the second matching mode is a target matching mode, determining a target byte where an unmatched part in the mask value is located according to the number of bytes, sequentially determining whether the part of the first mask length in the UID is matched with the part of the first mask length in the mask value from the lower bit of the target byte, and obtaining a matching result;
for example, if the first mask length is 7 and the number of bytes is 7, the target byte where the unmatched part in the mask value is located is 8; sequentially determining whether the part of the first mask length in the UID is the numerical value of 7 bits from 0 to 6 bits in the 8 th byte and is matched with the numerical value of 7 bits from 0 to 6 bits in the 8 th byte in the mask value or not from the lower bit of the target byte; if the matching is not consistent, executing step 11, and the electronic tag does not respond; if the matching is consistent, setting the time slot length and the time slot value according to the mask length, wherein if the first mask length is less than or equal to 4, the time slot length is set to 4, and the time slot value is the value of 4 bits behind the first mask length in the byte; if the first mask length acquired by the electronic tag is greater than 4, setting the time slot length to be 8 minus the first mask length, wherein the time slot value is the bit value left in the byte except the first mask length; finally, the byte length is increased by 1 and the first mask length is assigned to 0.
For example, if the first mask length is 7, the slot length is 1, and the slot value is the bit value of the last bit in the 8 th byte. After adding 1 to the byte length, assigning the byte length to be 8; the first mask length is assigned a value of 0.
Step 9, determining whether the 1 time slot anti-collision mode exists;
if the mode is a 1 time slot anti-collision mode and the matching result of the step 8 is consistent, executing a step 10;
if the mode is a 16-time-slot anti-collision mode and the matching result in the step 8 is consistent, judging whether the time slot length is less than 4; if the time slot length is less than 4, forming a time slot value with the time slot length of 4 by the time slot value of the current time slot length and the bit value of the higher byte, and matching the time slot value with a numerical value corresponding to a preset sequence; otherwise, matching the time slot value with a numerical value corresponding to a preset sequence; if the matching result is consistent, if the preset sequence is 15 or the sequence is the starting bit sequence, the matching is inconsistent, and the matching process is ended; if the matching results are consistent, executing step 10;
for example, in the 1-slot anti-collision mode, if the first mask length is 7, step 10 is executed; if the 16-time-slot anti-collision mode is adopted, the length of the first mask is 2, the length of the time slot is 4, and the value of the time slot is 4 bits behind the length of the first mask in the byte, namely the values of the 3 rd, 4 th, 5 th and 6 th bits in the byte are matched with a preset sequence; if the first mask length is 7, the time slot length is 1, that is, the value of the remaining 1 bit in the byte and the value of the 3 bits in the higher byte form a time slot value with the time slot length of 4, and the time slot value is matched with the preset sequence.
if the part of the first mask length in the electronic tag UID under the 1 time slot anti-collision mode is matched with the part of the first mask length in the mask value; or under a 16-time-slot anti-collision mode, matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value, wherein the time slot value is consistent with the preset sequence, the matching is successful, and otherwise, the matching is failed; executing the step 11;
for example, in a 1-slot anti-collision mode, if the first mask length is 63, the 63-bit UID and the 63-bit mask value are consistent, and the matching result is successful;
in addition, when the electronic tag is in a 16-slot anti-collision mode, if the first mask acquired by the electronic tag is equal to 60, the 60-bit UID is consistent with the 60-bit mask value, and the time slot value with the time slot length of 4 is also consistent with the preset sequence, the matching result is successful.
if the matching results are consistent, the electronic tag responds and sends response information to the reader; and if the matching results are not consistent, the electronic tag does not respond.
According to the unique identifier UID matching method, device and equipment of the electronic tag, matching is carried out in a corresponding appropriate matching mode according to different lengths of the acquired first mask, and response is carried out according to a matching result; when the length of the first mask is greater than the first preset length, the first matching mode is determined as a target matching mode, so that the time required for matching the mask can be greatly reduced, and the performance is improved; when the length of the first mask code is smaller than the second preset length, the second matching mode is determined as a target matching mode, the defect that the performance of the first matching mode is reduced in the scene is overcome, and the situation that the length of the first mask code is smaller than the second preset length can be matched only in one clock cycle to obtain a result; according to the invention, the corresponding proper matching mode is determined through the length of the first mask, so that the design area is relatively small while higher performance is obtained, and the balance between cost and performance is effectively considered.
Fig. 4 is a schematic structural diagram of a unique identifier UID matching device of an electronic tag provided by the present invention. The unique identifier UID matching apparatus for electronic tags provided in this embodiment includes:
an obtaining module 710, configured to obtain a first mask length and a mask value corresponding to the first mask length; determining a target matching mode according to the first mask length;
the processing module 720, which matches the part of the electronic tag UID with the first mask length in the mask value by using the target matching mode, to obtain a matching result; and responding to the reader according to the matching result.
Optionally, the processing module 710 is specifically configured to:
under the condition that the length of the first mask is larger than a first preset length, the target matching mode is a first matching mode;
and under the condition that the length of the first mask is smaller than a second preset length, the target matching mode is a second matching mode.
Optionally, the processing module 720 is specifically configured to: in case the first mask length is greater than a first preset length,
step a, if the first mask length is smaller than the length threshold, determining a first matching length according to the first mask length and a preset corresponding relation, and determining whether a part from a preset bit to a target bit in the UID is matched with a part from the preset bit to the target bit in the mask value; the preset bit is the number of bytes multiplied by the number of byte bits, the target bit is the preset bit plus the bit of the first matching length, and the initial value of the number of bytes is the target value;
step b, if the first mask length is matched with the second mask length, subtracting a first numerical value from the first mask length to obtain a second mask length; increasing the number of bytes by a first number of bytes; the first value is the first matching length plus the second value; the first byte number is the first numerical value divided by the byte bit number;
and c, taking the second mask length as the first mask length, and repeatedly executing the steps a-b until the first mask length is smaller than the second preset length.
Optionally, the processing module 720 is specifically configured to:
under the condition that the first mask length is smaller than a second preset length, determining a target byte where an unmatched part in the mask value is located according to the number of bytes, sequentially determining whether the part of the first mask length in the UID is matched with the part of the first mask length in the mask value from the lower bit of the target byte, and obtaining a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
Optionally, the processing module 720 is specifically configured to:
if the first mask length is equal to the length threshold, determining whether the UID is matched with the mask value, and acquiring a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
Optionally, the processing module 720 is specifically configured to:
determining a time slot value and a time slot length according to the first mask length;
determining whether the time slot value is consistent with the value corresponding to the preset sequence or not according to the time slot length;
and if so, responding to the reader according to the matching result.
The apparatus of the embodiment of the present invention is configured to perform the method of any of the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 5 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 5: a processor (processor)810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. Processor 810 may invoke logic instructions in memory 830 to perform a unique identifier UID matching method for an electronic tag, the method comprising: acquiring a first mask length and a mask value corresponding to the first mask length; determining a target matching mode according to the first mask length; matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using the target matching mode to obtain a matching result; and responding to the reader according to the matching result.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product including a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, which when executed by a computer, enable the computer to perform the unique identifier UID matching method for electronic tags provided by the above methods, the method including: acquiring a first mask length and a mask value corresponding to the first mask length; determining a target matching mode according to the first mask length; matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using the target matching mode to obtain a matching result; and responding to the reader according to the matching result.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method for unique identifier UID matching of an electronic tag provided as above, the method comprising: acquiring a first mask length and a mask value corresponding to the first mask length; determining a target matching mode according to the first mask length; matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using the target matching mode to obtain a matching result; and responding to the reader according to the matching result.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A unique identifier UID matching method of an electronic tag is characterized by comprising the following steps:
acquiring a first mask length and a mask value corresponding to the first mask length;
determining a target matching mode according to the first mask length;
matching the part of the first mask length in the electronic tag UID with the part of the first mask length in the mask value by using the target matching mode to obtain a matching result;
and responding to the reader according to the matching result.
2. The method for matching unique identifier UID of electronic tag according to claim 1, wherein the determining a target matching manner according to the first mask length comprises:
under the condition that the length of the first mask is larger than a first preset length, the target matching mode is a first matching mode;
and under the condition that the length of the first mask is smaller than a second preset length, the target matching mode is a second matching mode.
3. The method as claimed in claim 2, wherein when the first mask length is greater than a first preset length, the matching, by using the target matching method, between the part of the unique identifier UID of the electronic tag with the first mask length and the part of the mask value with the first mask length to obtain the matching result includes:
step a, if the first mask length is smaller than a length threshold, determining a first matching length according to the first mask length and a preset corresponding relation, and determining whether a part from a preset bit to a target bit in the UID is matched with the part from the preset bit to the target bit in the mask value; the preset bit is the number of bytes multiplied by the number of byte bits, the target bit is the preset bit plus the bit of the first matching length, and the initial value of the number of bytes is a target value; the corresponding relation comprises: the corresponding relation between the first mask length and the first matching length;
step b, if the first mask length is matched with the second mask length, subtracting a first numerical value from the first mask length to obtain a second mask length; increasing the number of bytes by a first number of bytes; the first value is the first matching length plus a second value; the first byte number is the first numerical value divided by the byte bit number;
and taking the second mask length as the first mask length, and repeatedly executing the steps a-b until the first mask length is smaller than a second preset length.
4. The method as claimed in claim 3, wherein when the first mask length is smaller than a second preset length, the matching, by using the target matching method, between the part of the unique identifier UID of the electronic tag with the first mask length and the part of the mask value with the first mask length to obtain the matching result includes:
determining a target byte where an unmatched part in the mask value is located according to the number of bytes, sequentially determining whether the part of the first mask length in the UID is matched with the part of the first mask length in the mask value from the lower bit of the target byte, and obtaining a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
5. The unique identifier UID matching method of electronic tags according to claim 3 or 4, characterized by further comprising:
if the first mask length is equal to the length threshold, determining whether the UID is matched with the mask value, and acquiring a matching result;
and if the matching result is matching, responding to the reader according to the matching result.
6. The UID (unique identifier) matching method for the electronic tag according to any one of claims 1-4, wherein before responding to the reader according to the matching result, the method further comprises the following steps:
determining a time slot value and a time slot length according to the first mask length;
determining whether the time slot value is consistent with the value corresponding to the preset sequence or not according to the time slot length;
and if so, responding to the reader according to the matching result.
7. An electronic tag Unique Identifier (UID) matching apparatus, comprising:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a first mask length and a mask value corresponding to the first mask length;
the processing module is used for determining a target matching mode according to the first mask length; the electronic tag UID is used for matching a part of the electronic tag UID with a first mask length by using the target matching mode to obtain a matching result; and responding to the reader according to the matching result.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, carries out the steps of the unique identifier UID matching method of an electronic tag according to any one of claims 1 to 6.
9. A non-transitory computer readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the unique identifier UID matching method of an electronic tag according to any one of claims 1 to 6.
10. A computer program product comprising a computer program characterized in that the computer program, when being executed by a processor, carries out the steps of the unique identifier UID matching method of an electronic tag according to any one of claims 1 to 6.
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